My laser power is too High, causing saturation of the sensor. What can I do to measure it?
The WB-I SWIR is designated to operate without any ND filters on InGaAs camera. The attenuation is performed via Iris control wheel, which attenuates by up to 100 (ND2) . Addition of any filters will disrupt magnification.
In case additional attenuation is required, LBS-400 beam splitter is recommended.
What Camera can I use with WB-I SWIR Accessory?
How do I insert correct magnification of WB-I and WB-I SWIR?
What are recommended measurement parameters for WB-I and WB-I SWIR ?
According to the light source and beam geometry, customer will choose the measurement parameters which will yield most suitable results for the application, e.g. D4σ is the best for gaussian fit at M2 = 1, 50% of Peak value (FWHM) for "Tophat".
For repeatable and reproducible results, use the UltraCal and Aperture features.
For divergence angle measurements, distance from source to imaging screen should be measured. Screen is 0.5mm inside support tube end surface.
The Divergence Angle measurements can be enabled in the Results area of the BeamGage application:
In BeamGage, go to "Computation" > Divergence >Far Field Wide Angle settings to set distance from source to WB-I screen.
BeamGage is giving me results that are very different than expected.
Can it measure smaller diameters than specified 10mm?
What is the maximum power?
The Ophir WB-I SWIR is a Wide Beam Imager accessory designated for SWIR 900-1700nm, especially popular 1550nm wavelength.
It's a compact system for measuring the size and power distribution of large and divergent beams of VCSELs, LEDs and large lasers.
Enables analyzing beams that are too large or divergent for a standard beam profiler
Measuring Challenges of Wide and Divergent Beams
VCSEL Near-Field Profiling and Testing in Production
The LBS-400 beam sampler attachment for Pyrocams and large format Beam Profilers allows measuring UV, NIR or IR wavelength laser beams with diameters up to 1 inch (25.4mm) and powers ranging from 10mW to ~500W(1). The output beam preserves the polarization of the original beam.